Item 50917 - 78 Exchange Street, Portland, 1924 Item 50917 - 78 Exchange Street, Portland, 1924 Contributed by City of Portland - Planning & Development Item 50917 Zoom 4702px x 3400px - 15.7"w x 11.3"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Offices at 78 Exchange Street in Old Port, Portland, was owned by Grace P., John R., Allan S. Locke Trustees in 1924. Show Details